Well, I currently have 3 pairs - T830 with original crossover, T930 series II, T1000. All 3 are wonderful speakers!
I agree with tvdantv that the T930 has more bass than the T830 and T1000. In my room, the T930 sounds a bit boomy and I get more balanced bass with the T830s andT1000s, coupled with an SVS sub.
Regarding the tweeters, I find the CFT3 a bit shy - not a problem if you have an old fashion treble control. The CFT5 is a bit more expressive.